Siemens SIMATIC HMI TP 170A Equipment Manual page 48

Installation
Power supply
The power supply for the operating unit is connected at the 2-pin plug connector on
the underside of the unit. Use the 2-pin terminal block supplied for this purpose.
The terminal block is designed for cables with a cross-section not larger than
2
2.5 mm .
The figure illustrates a view of the underside of the unit.
1 2
Please refer to the technical data in Appendix A for information on the power
supply requirements.
Caution
!
When using a 24 V supply, make sure that the extra-low voltage is isolated
safely. Use only power supply units complying with IEC 364-4-41 or
HD 384.04.41 (VDE 0100, Part 410).
The supply voltage must be within the specified voltage range. Voltages
outside this range can cause malfunctions.
Grounding connection
Connect the grounding connection of the operating unit to the rack ground.
Use the grounding screw provided and a conducting cable with a diameter
2.5 mm
7-6
CuuDuongThanCong.com
GND
+ 24 VDC
2
.
TP 170A Equipment Manual
Release 12/99
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